Trey Parker and Matt Stone Say They Dropped Acid Before the Oscar.

When the co-creators of “South Park,” Trey Parker and Matt Stone, showed up at the 2000 Academy Awards ceremony wearing gowns similar to those worn by Jennifer Lopez and Gwyneth Paltrow at previous awards shows, some people blew it off as the guys being their normal irreverent selves.
Others no doubt wondered if the pair had imbibed in a little recreational pharmaceuticals.
As it turns out, yes. To both.
That year, Parker and Marc Shaiman were nominated for a Best Original Song Oscar for “Blame Canada” from the 1999 movie, “South Park: Bigger, Longer & Uncut.” And because Parker and his partner-in-crime Stone are nothing if not unconventional, they thought it would be funny to go to the ceremony wearing the then-iconic dresses.
This past March, they told David Letterman they had indeed been “Sheening [their] heads off.” But without specifics, many thought they meant they’d been high on cocaine — which, lo these several months ago, was Charlie Sheen’s (alleged) drug of choice.
But not so, they now say. It wasn’t cocaine! It was acid. Which, when you think about it, really makes a lot more sense.